Bomb-proof building



im @AFI-:i @AMK Piiomrmri im RELATED navi-itis.

Dec. 18, 1934. E. F. GEIGER m' AL BOMBPROOF BUILDING original Filed June 27', 1933 l WMM Patented Dec. 18, 1934 UNITED STATES PATENT OFFICE BOMB-PROOF BUILDING Eugenie Frey Geiger and Josef Geiger, Milwaukee, Wis.

2 Claims.

The invention, described and disclosed herein, relates to new and useful improvements in bombproof buildings, and more specifically to the roofs of such buildings, and it has for its object to provide a construction that will withstand the effect of an aerial attack under any and al1 circumstances.

This present application is a divisional application of an application filed by us, under Serial No. 677,784, for Safety-Ventilating and bomb-proof systems.

As the construction of the said improvements is comparatively simple, the cost of the installation thereof should be proportionately low.

With the above and other objects in view, this invention consists of the novel features of construction, combination and arrangement of parts, hereinafter fully described, claimed and illustrated in the accompanying drawing forming part of this specification, and in which similar characters of reference indicate corresponding parts in all views, and in which:

Figure 1 shows a side elevation, and, partly in section, the detail and relative construction of a bomb-proof roof.

Referring more particularly to the drawing, 36 denotes the surrounding wall of a building. Inside the said wall and about three feet lower than this, a concrete wall 37 has been built; on top of this latter wall is mounted heavy iron beams 38, which serve as support for a great number of slightly curved iron rafters 39, arranged with appropriate distance upon said beams 38.

A system of steel bracers 40, including heavy posts 41, is arranged under the roof proper, while a great number of joists 46 are arranged in support of the structure, as shown.

The floor 42 consists of heavy steel plates of a suitable thickness, while the roof proper comprises two layers of steel plates 43 and 44, between which are mounted strong steel coiled springs 45, as shown, thus making this roof absolutely bomb-proof. In addition, the top portion of the plates, constituting the roof proper, or upper layer, may be camouflaged to make it less discernible from the surroundings.

As a further and additional means to prevent or offset any effect of even the most powerful bombs, a great number of sacks 47, filled with preferably beach sand have been arranged in the spaces between the rafters, i. e., between the oor or ceiling and the roof proper.

It is obvious that changes may be made in the form, construction and arrangement of the several parts, as shown, within the scope of the appended claims, without departing from the spirit of the invention, and we do not therefore wish to limit ourselves to the construction and arrangement shown and described herein.

What we claim as new, and desire to secure by Letters Patent of the United States, isz- 1. In a device of the class described, in combination, a bomb-proof building roof supported by an outer and an inner'wall, the latter being of less height than the former, beams longitudinally positioned upon the inner wall, curved rafters mounted at a distance between themselves upon said beams, an upper and a lower curved roof portion concentrically arranged, with space therebetween, the lower roof portion being supported by the rafters, coiled springs disposed between said lower and upper roof portions, Va plurality of joists arranged in a crosswise manner relative to the longitudinally positioned beams and supported by the latter, a ceiling formed upon and embodying said joists, bracers crosswise arranged between the ceiling and the lower roof portion, and an upright centrally positioned re-enforcing member adapted to support said bracers, and bags lled with suitable material disposed between the ceiling and the lower roof portion, substantially as shown and described.

2. In a device of the class described, in combination, a bomb-proof building roof having an outer and an inner wall, the latter being of less height than the former, beams longitudinally positioned upon said inner wall, curved rafters mounted at a distance between themselves upon said beams, an upper and a lower curved roof portion concentrically arranged, with space therebetween, the lower roof portion being supported by the rafters, coiled springs disposed between said lower and upper roof portions in a staggered manner, joists mounted upon the longitudinally positioned beams, bracers arranged between the lower roof portion and the joists, a ceiling mounted upon said joists, uprights between the joists and the rafters and serving as support for the bracers, and shock and sound absorbing means disposed between the ceiling and the lower roof portion.

EUGENIE FREY GEIGER. JOSEF GEIGER. 

